Implement write to HBase

[elliVM]

Description
Create classes and tests for writing extracted SQL data to HBase.

[elliVM]

Write is done using a HBaseClient with putAll(List) method.
Maps rows into hbase put objects -> uses buffer mutator to write to hbase.
BufferMutator has configurable params for dynamic buffer size depending on the input list size and put object size.
with configurable overhead multiplier.
Using optimal size for buffer helps with writes and memory management.
dynamic buffer can be enabled and disabled by configuration: